加压流体萃取-气质联用法测定土壤中15种多环芳烃

Determination of 15 Polycyclic Aromatic Hydrocarbons in Soil by Pressurized Fluid Extraction-GC-MS Method

建立加压流体萃取-气质联用法用于测定土壤中15种多环芳烃,对萃取溶剂、净化洗脱、分析温度等条件进行优化比选,采用不分流和选择离子模式进行测定。结果表明,此方法在5~1000μg/L范围内,15种多环芳烃相对响应因子的相对标准偏差均小于20%;方法检出限为0.1~0.4μg/kg,回收率为41.7~128%,相对标准偏差2.6%~13.3%。方法灵敏度高,优于现有标准,准确度和精密度均满足多环芳烃批量痕量检测要求。

A pressurized fluid extraction-GC-MS method was established for the determination of 15 kinds of polycyclic aromatic hydrocarbons in soil. The extraction solvent, purification and elution and analysis temperature were optimized and determined by nonshunt and selective ion mode. The results show that in the range of 5~1000 μg/L, the relative standard deviations of the relative response factors of 15 polycyclic aromatic hydrocarbons are all less than 20%;the detection limit of the method is 0.1~0.4 μg/kg, the recovery is 41.7% 128%, and the relative standard deviation is 2.6%~13.3%. The method has high sensitivity and is superior to the existing standards, and its accuracy and precision can meet the requirements of batch trace detection of polycyclic aromatic hydrocarbons.